Trail Tech 732-A00 Black Panel Mount TTO Digital Tachometer Plus Hour Meter The panel mounted tto digital tach/hour gauge allows you to easily monitor your engine's Total running hours and set custom maintenance reminders Large readable display allows you to easily monitor your engine's running hours up to 99,999 Total hours ensuring that you perform proper maintenance on your engine The LCD display lets you to easily view all gauge readings regardless of the angle or lighting conditions Features: tachometer from 0-19999 RPM, with Max RPM, non-resettable hour meter from 0-99999 hours, customizable warnings and maintenance reminders from 1-999 hours with flash alert service alarms Panel mount for easy install in a dash or instrument panel, screen size: 25.5 x 13.4mm (1 x 52") physical Dimensions: 25x50x14mm wxhxd (1x2x.5" wxhxd), internal battery with a life of 5 years